The only pic I have off mine is from when I replaced my heater core. Unfortunately, all of the wires are green as I had previously replaced the resistor when it went bad and melted itself to the connector. I got a new connector off rockauto which came with pigtail wires to splice in, hence the all green wiring I have at the plug now.
For a 2000 model, wire colours should be
1 Tan
2 Light Green
3 Light Blue
4 Black/Tan
When the resistor pack is mounted in the housing the black/tan
I think would be on the left and the tan on the right. A picture would obviously confirm that.
Edit: found a pic in an old thread I'd posted in on Jeepforum.com.
The TJ the pic is from is LHD but the connector is mounted the same way up and the wires are arranged the same way in both LHD and RHD.